Shedding mechanism for looms



(No Model.) 3 Sheets-Sheetl'.

E. INGRAHAM. SHEDDING MECHANISM FOR LOOMS.

No. 503,375. Patented Au 15, 1893;

3 Sheets+-Sheet 2.

(No Model.)

B. INGRAHAM. SHEDDING MECHANISM FOR Looms lrl (K0 Model.) 3 Sheets-Sheet3. E. INGRAHAM. SHEDDING MECHANISM FOR LOOMS.

Patented Aug. 15, 1893.

with my invention.

UNITED STATES PATENT OFFICE.

EDMUND INGRAHAM, OF PHILADELPHIA, PENNSYLVANIA.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 503,375, dated August15, 1893.

Application filed March 23, 1891. Serial No. 886,033- (No model.)

To aZZ whom it may concern.-

Be it known that I, EDMUND INGRAHAM, a citizen of the United States, anda resident of Philadelphia, Pennsylvania, have invented certainImprovements in Shedding Mechanism for Looms, of which the following isa specification.

My invention relates especially to heddle or harness operating devicesfor what are known as open shed looms, the object of my invention beingto effect the movement of the heddle frames Without any severe strain onthe operating devices, to insure the locking of the heddle frames whenthe shed is open, so as to permit the jacks to be readily shifted, andto provide for lifting the depressed heddle-frames independently of theregular operating mechanism when it is desired to gain access to a warpthread in the lower portion of the shed. These objects I attain in themanner hereinafter set forth and claimed, reference being had to theaccompanying drawings, in which- Figure 1, is a transverse section,partly in elevation, of a loom provided with heddle operating mechanismconstructed in accordance Fig. 2 is an enlarged verticalsectional viewof said heddle operating mechanism. Figs. 3 and 4, are like views ofparts of the mechanism, in different positions, and Fig. 5, is atransverse section on theline l-2, Fig. 2.

A represents part of the frame of a loom, and B, B represent heddleframes to which are connected cords a, a passing over pulleys Z), b,said cords being connected to heddle levers D mounted on the frame ofthe loom, and these heddle levers being in the form of bell cranks, onearm of each lever being connected to the upper cords a of itscorresponding heddle frame, and the other arm to the lower cord a of thesame. Each heddle lever has on its lower arm an upwardly projecting studd, the upper end of which carries an antifriction roller cl, (see dottedlines Fig. 2) which is adapted to an inclined slot f in slide F guidedin suitable transverse bearings C on the frame of the heddle operatingmechanism, so that, as these slides are moved to and fro, their inclinedslots, acting on the antifriction rollers carried by the studs d of theheddle levers, will cause said heddle levers to vibrate upon the fulcrumshaft 0, and will thus raise and lower the heddle frames B and the pathin which the roller is forced to travel by the action of the inclinedslot will be curved, and will be almost at right angles to the thrustimparted by the inclined portion of the slide F; by which means the upand down thrusts upon the slide F is lessened, as compared with a thrustdirectly across the line of movement of said slide.

At each end of the inclined slot of eachslide F is an offset f, and whenthe slide is in either of its extreme positions, the antifriction rolleron the stud d of the heddle lever occupies one of these off-sets and theheddle frames are thereby effectually locked in their extreme positionscorresponding to the open shed, the strain upon the heddles having noeffect in moving the slides from the positions to which they have beenadjusted.

In order to provide for the effective guidance and lateral retention ofthe slides F, and yet permit said slides to be arranged closelytogether, the top and bottom edges of the guiding portion of each slideare beveled or V- shaped, and the guide bars 0 have like beveled orV-shaped grooves for the reception of these beveled edges of the slides,as shown in Fig. 5.

The movement of the slides F to effect the rise and fall of theheddle-frame demanded by the required shedding of the warp, is derivedfrom reciprocating bars G and H, which are carried by guide blocksg thelatter being connected by rods h respectively to the upper and lowerarms of a three-armed lever I hung to a transverse shaft h, the thirdarm of said lever being connected by a rod 72. and link lbs to a spurwheel h driven from any suitable part of the loom.

Hung to each of the slides F is a jack J, which has, on its upper andlower edges, lugs z, i facing in opposite directions, and each of thesejacks J is under the control of a finger k on a pivoted arm K, which isacted upon by the pins m of a pattern chain M, carried bya pattern drumN, the intermittent movement of the latter being effected by anysuitable means, for instance by means of a ratchet wheel a on the drumshaft, acted on by a pawl carried by an arm a hung to said shaft, andvibrated by the bar H through the medium ICO of a rod M, as shown inFig. 2. When the parts are in the position shown in Fig; 2, the bars Gand H are at the extremes of their rearward movement, and are about tomove forward, that is to say, the bar G is about to move to the rightand the bar H to the left. The jacks of the slides of those heddleframes which are to be lifted have been raised so thattheir lugs't' arein engagement with the bar G, while the jacks of the slides of thoseheddle frames which are to be lowered, have been dropped so that theirlugs en gage with the bar H, the jacks of the slides of thoseheddleframes which are notto be" raised being allowed to remain down, and thejacks of the slides corresponding to thehed- H dle frameswhich are notto be depressed bein g allowed to, remain up. T As the bars G and H moveforward, corresponding movement is imparted to those slides whose jacks.are in engagement with the bars, as shown inFig. 3, the movement of theheddle-fraines from one position tothe other being effected by theslides,which, owing to their inclined slots, so

act upon the heddle levers, that the movement of the latter is effectedeasily and smoothly and without shock or jar upon the operating portionsof the device, the heddle frames being finally locked in their extremepositions,

(that is to say with the shed openyowing to the off-set ends of theinclined slots in the slides On the backward movement of the. slides Gand H, the pattern chain is shifted and the jacks J are raised andlowered in ac= cordance with the requirements of the pattern. (See Fig.4.) In order to permit the upper bar G to yield against the pressure ofthe jacks from below, said bar has journals go which are free to turn intheguide blocks 9,

the preponderance in weight being in advance of the journals,so that theacting edge of the bar G will fall into engagementwith the lugs i of thejacks, as soon as said bar is fully retracted. i V

To prevent the links of the pattern chain from being carried aroundbythe under side of the drum N, I mount adjacentto the latter, adeflecting shoe P, which soacts upon the depending portion of the chain,as to press its links out of the spaces betweenthe teeth of the drum,asshown in Fig. 2. a

In order to effectthe raising of the lower heddle frames withoutcorresponding movement of the reciprocating bar G, when it becomesnecessary to raise the warps constitut ing the lower portion of theshed,so as to tie up a broken thread, or for other purposes, I

mount at one side of the loom a lever S, ass

shown by dotted lines in Fig. 2, this lever carrying a transverse bar 8which acts upon downwardly projecting lugst upon the slides that onoperating the lever S by hand, an

outward movement of all of these slides can be effected independently ofthe regular operating devices. It will be observed that thereciprocating bars G and H act only upon one side of the lugs it" ofthejacks J so that said lugs are free to move away from thereciprocating bars when theslides ,aremoved by the evener bar. By soconnecting thelever S, the leverage for raising the heddle .frames whendesired, is so increasedthat this operation may be easily performed.This is of great importance, especially where the loom has a largenumber of heddles.

Having thus described myinvention, I

1. The combination ofthe heddle frames,

.nected to thetopand the other arm tothe claim and desire to secure byLetters Pat 8nt+ i T L 8o bell crank levers each having one armconbottomof its'respective heddle frame,a stud projecting from0116.31111 of each bell cranln lever and having an autifriction rollerat'its "outer end, slides each comprising horizontal end portions and aninclined central portion with slot having ofiset endsfor the receptionof said antifrictionroller, guides for the horizontal portions of saidslides, jacks hung to theslides and havinglugs at top and bottom,

upper and lower reciprocating bars acting on said jacks, the upper barbeing pivoted,and

pattern mechanism for controlling the engagement of the. jacks withsaidbars, substantially as specified.

2. The combination of the hedd'le frames, i the heddle levers, slideshavinginclined slots and beveled edges, upper and lower bars havingbeveled notches for receiving and guiding the beveled edges of theslides, jacks hung 'to said slides, reciprocating bars acting 011 saidjacks, and pattern mechanism controlling the jacks, substantially asspecified.

3. The combination of the heddle frames,

the heddle levers, slides haviiiginclined slots for receivingprojections on said heddle 1e-- vers,jacks hung to said slides, andhaving projecting lugs reciprocating bars acting on. one side only ofsaid lugs", pattern mechanismcontrolling said jacks, and a lever havingarod for acting upon theslides of the de-.

pressed heddles independently of the ordinary reciprocating mechanism,substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. t

, EDMUND INGRAHAM. H Witnesses: t

EUGENE ELTERIGH,

